ILIMA at FAIR Isomers, Lifetimes and Masses at Facility for Antiproton and Ion Research GSI,...
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Transcript of ILIMA at FAIR Isomers, Lifetimes and Masses at Facility for Antiproton and Ion Research GSI,...
ILIMA at FAIR
Isomers, Lifetimes and Masses atFacility for Antiproton and Ion Research GSI, Darmstadt, Germany
78 scientists, 20 institutions, 10 countries
Phil Walker, spokesperson, U of SurreyYuri Litvinov, deputy spokesperson, GSIHelmut Weick, project manager, GSI
FAIR at GSI
Intense beams of RIBsand very exotic nuclides
SIS 18
SIS 100/300
Super-FRS
NESR
CRRESR
ESR
GSI todayGSI today Future facilityFuture facility
ESR
ILIMA
Dy-149 in ESR
149Dy in the Experimental Storage Ring[Yu.A. Litvinov et al., Phys. Lett. B573 (2003) 80]
Isomers, Lifetimes and Masses
I = 27/2
I = 7/2SIS
FRS
ESRSchottky P ick-U ps
from U
NILA
C Target
Electron cooler
TO F detector
ESR circumference = 108 m[isomers up to I = 43/2 seen in fragmentationPodolyak et al., Phys. Lett. B632 (2006) 203]
[Yu.A. Litvinov et al., Nucl. Phys. A756 (2005) 3]
single-ion in-ring decay
No
ise
po
we
r d
en
sity
/ a
rb. u
.
Tim
e af
ter
inje
ctio
n
Pr140 58+
C e140 58+
Q = 3388 keVEC
Frequency [kHz] - 61000.0
187.4 187.6187.2 187.8
Insert scraper
Frequency [kH z] - 61000.0
187.4 187.6187.2 187.8T
ime
afte
r in
ject
ion
Noi
se p
ow
er d
ensi
ty /
arb.
u.
Pr140 58+ C e140 58+
Q = 3388 keVEC
Injection length 170 s Injection length 520 s
isomer beam purification
[F. Bosch et al., Int. J. Mass Spec. 251 (2006) 212]
125mCe58+ (t1/2~150s)
[C. Petrache et al.,Eur. Phys. J. A14 (2002) 439]
B. Sun et al., Eur. Phys. J. A31 (2007) 393
92 keV
first “new” isomer in ESR
SMS and IMS
Schottky Mass Spectrometry (with cooling): T½ > 1 s
Isochronous Mass Spectrometry: T½ > 10 μs
both methods have single-ion sensitivity
resolving power ~ 106
accuracy ~ 30 μu, i.e. ~ 30 keV
mass measurements
electron cooling
Schottky method
ADC 640 kHz
time-of-flight detectorsfor isochronous method
isochronous method[L. Chen et al., GSI Annual Report 2005;R. Knöbel et al., AIP Conf. Proc. 891 (2007) 199]
FAIR rings
NESR circumference = 222 m
IMPROVEMENTSlarger momentum acceptancemore Schottky pickupscooled Schottky pickupsTOF-detector optimisation=> better efficiency=> better resolution=> shorter half-lives
potential for new masses with ILIMA
58
65 r-processpath
rp-processpath
2028
50
82
8
8
20
28
50
82
126
m asses m easured at the FR S-ESR
stable nucle i
nuclides w ith know n m asses
W ill be m easured w ith SU PER-FR S-C R-N ESR
more beam (x1000)more efficiency (x10)more sensitivity
ILIMA collaborationGSI, Germany: E. Badura, K. Beckert, F. Bosch, C. Dimopoulou, A. Dolinski, P.Egelhof, B. Franczak, B. Franzke, H. Geissel, F. Herfurth, J. Hoffmann, H.-J. Kluge, R.K. Knöbel, C. Kozhuharov, N. Kurz, S.A. Litvinov, Yu.A. Litvinov, G. Münzenberg, F. Montes, I. Nesmiyan, F. Nickel, F. Nolden, C. Nociforo, W. Ott, W. Quint, C. Scheidenberger, H. Simon, M. Steck, Th. Stöhlker, K. Sümmerer, B. Sun, S. Typel, G.K. Vorobjev, H. Weick, N. Winckler, M. WinklerGießen, Germany: D. Boutin, L. Chen, T. Dickel, B. Fabian, M. Petrick, W.R. PlaßMünchen, Germany: T. Faestermann, P. Kienle, L. Maier, P. Ring, D. VretenarFrankfurt,Germany: Th. BürvenichMainz, Germany: K. Blaum, K.-L. Kratz, B. PfeifferSt.Petersburg, Russia: Yu.N. Novikov, D.M. Seliverstov, Yu. GusevOrsay, France: G. Audi, D. LunneyBruxelles, Belgium: K. TakahashiThessaloniki, Greece: G.A. LalazissisWarsaw, Poland: Z. Janas, M. Pfützner, Z. PatykSurrey,UK: Z. Podolyak, P.M. WalkerEdinburgh, UK: P.J. Woods, Z. LiuManchester, UK: D.M. CullenMSU, USA: M. Hausmann, M. Matoš, H. SchatzLos Alamos, USA: D. Madland, P. Moeller, D. VieiraLanzhou, China: Ruishi Mao, Zhiyu Sun, Guoqing XiaoNiigata, Japan: T. OhtsuboSaitama, Japan: T. Suzuki, T. YamaguchiTsukuba, Japan: A. Ozawa
78 scientists, 20 institutions, 10 countries